@font-face{font-family:Archivo;src:url('/assets/archivo-latin.woff2') format('woff2');font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:Archivo;src:url('/assets/archivo-latin-ext.woff2') format('woff2');font-weight:100 900;font-style:normal;font-display:swap;unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C4,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:SourceSans;src:url('/assets/source-sans-latin.woff2') format('woff2');font-weight:200 900;font-style:normal;font-display:swap}
@font-face{font-family:SourceSans;src:url('/assets/source-sans-latin-ext.woff2') format('woff2');font-weight:200 900;font-style:normal;font-display:swap;unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C4,U+2113,U+2C60-2C7F,U+A720-A7FF}
:root{--ink:#202321;--body:#414840;--muted:#596159;--blue:#244fca;--line:#d6dad4;--paper:#f2f4f1;--sage:#d9dfd2;--content:1280px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:#fff;color:var(--ink);font-family:SourceSans,'Segoe UI',sans-serif;font-size:18px;line-height:1.65;-webkit-font-smoothing:antialiased}
::selection{background:#dce5ff;color:var(--ink)}
a{color:inherit;text-underline-offset:4px;text-decoration-thickness:1px}
button,input,select{font:inherit;accent-color:var(--blue);caret-color:var(--blue)}
button{cursor:pointer}
button,a,input,select{-webkit-tap-highlight-color:transparent}
img{display:block;max-width:100%;height:auto}
h1,h2,h3{font-family:Archivo,sans-serif;font-weight:600;line-height:1.12;letter-spacing:-.035em;text-wrap:balance}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(38px,4.7vw,66px);margin-bottom:28px;max-width:1100px}
h2{font-size:clamp(27px,3vw,39px);margin-bottom:24px}
h3{font-size:24px;margin-bottom:16px}
p{margin-bottom:22px}
ul,ol{padding-left:23px}
li{margin-bottom:9px}
:focus-visible{outline:3px solid var(--blue);outline-offset:5px}
[hidden]{display:none!important}
.container{width:min(calc(100% - 96px),var(--content));margin-inline:auto}
.icon{width:22px;height:22px;flex-shrink:0;vertical-align:middle}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;top:-100px;left:20px;z-index:30;background:#fff;padding:12px 20px;border:2px solid var(--blue)}
.skip-link:focus{top:15px}
.site-header{background:#fff;position:relative;z-index:5}
.header-inner{display:flex;align-items:center;gap:35px;min-height:112px}
.brand{font-family:Archivo,sans-serif;font-weight:750;font-size:41px;letter-spacing:-.04em;line-height:1;text-decoration:none}
.brand:after{content:'';display:block;width:30px;height:4px;background:var(--blue);margin-top:9px}
.brand-description{color:var(--muted);font-size:14px;line-height:1.35;margin:0}
.header-method{margin-left:auto;font-size:14px;text-decoration:none}
.header-method:hover{text-decoration:underline}
#navigation{display:flex;align-items:center;gap:35px;min-height:55px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
#navigation a{text-decoration:none;font-size:15px;padding:15px 0;line-height:1.4;white-space:nowrap}
#navigation a:hover,#navigation a[aria-current]{color:var(--blue)}
#navigation .nav-tool{margin-left:auto;color:var(--blue);font-weight:650}
.menu-toggle{display:none;align-items:center;gap:8px;border:0;background:none;padding:8px 0;color:var(--ink)}
.home-hero{display:grid;grid-template-columns:.85fr 1.15fr;gap:45px;align-items:center;padding-block:35px 0}
.hero-copy{padding-block:35px 50px}
.hero-copy h1{font-size:clamp(56px,6.8vw,96px);letter-spacing:-.04em;line-height:.98;margin-bottom:30px}
.hero-copy>p{font-size:20px;line-height:1.6;max-width:33ch;color:var(--body);margin-bottom:30px}
.hero-guide{display:block;max-width:36ch;margin-top:32px;font-size:14px;color:var(--muted);line-height:1.65}
.hero-photo{margin:0;align-self:stretch;display:flex;flex-direction:column;min-width:0}
.hero-photo img{width:100%;height:540px;object-fit:cover;object-position:60% 50%}
.hero-photo figcaption{font-size:12px;color:var(--muted);padding-top:12px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;background:var(--blue);border:1px solid var(--blue);border-radius:3px;padding:14px 23px;color:#fff;text-decoration:none;font-size:15px;font-weight:650;line-height:1.5;transition:background .15s}
.button:hover{background:#193b9d;border-color:#193b9d}
.button .icon,.text-link .icon{display:none}
.text-link{color:var(--blue);font-size:15px;font-weight:650;text-decoration:underline;line-height:1.6}
.solutions-section{padding-block:65px 75px}
.solutions-section>h2{font-size:23px;margin-bottom:27px}
.category-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:30px}
.category-card{text-decoration:none;border-top:2px solid var(--ink);padding-top:20px;display:block}
.category-card h3{font-size:23px;line-height:1.25;margin-bottom:14px}
.category-card p{font-size:16px;line-height:1.45;margin-bottom:10px}
.category-card>span{font-size:13px;color:var(--muted);display:block;line-height:1.55;max-width:30ch}
.category-card:hover h3{color:var(--blue);text-decoration:underline}
.air-feature{display:grid;grid-template-columns:1fr 1fr;background:var(--sage);padding:55px 60px;gap:60px;align-items:center}
.air-feature h2{font-size:clamp(30px,3vw,43px);line-height:1.15;max-width:18ch;margin-bottom:23px}
.air-feature-copy>p{font-size:18px;line-height:1.7;max-width:41ch;margin-bottom:27px}
.air-feature .button{background:var(--ink);border-color:var(--ink)}
.air-feature .button:hover{background:#3b443a}
.air-feature-links{display:flex;flex-direction:column;gap:8px;margin-top:25px;font-size:14px}
.air-explanation{min-width:0}
.air-explanation svg{width:100%;display:block;height:auto;color:#3e4a38}
.diagram-labels{display:flex;justify-content:space-between;gap:10px;font-size:13px;font-weight:600}
.air-explanation>p{font-size:13px;margin-top:25px;line-height:1.6;max-width:51ch}
.journal-section{padding-block:80px}
.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:30px;margin-bottom:30px}
.section-heading h2{margin-bottom:0}
.section-heading>div>p{margin-top:18px;margin-bottom:0;color:var(--muted);font-size:16px;max-width:70ch}
.section-heading>.text-link{flex-shrink:0}
.journal-layout{display:grid;grid-template-columns:1fr 1fr;gap:70px}
.journal-main{background:var(--paper);padding:35px 40px}
.journal-list{display:flex;flex-direction:column;gap:24px}
.guide-card{min-width:0}
.guide-meta{display:flex;justify-content:space-between;gap:16px;font-size:12px;color:var(--muted);margin-bottom:16px}
.guide-card h3{font-size:24px;line-height:1.3;margin-bottom:14px}
.guide-card h3 a{text-decoration:none}
.guide-card h3 a:hover{text-decoration:underline}
.guide-card>p{font-size:16px;color:var(--body);line-height:1.65;margin-bottom:0}
.guide-featured h3{font-size:38px;line-height:1.16;max-width:18ch;margin-block:40px 25px}
.guide-featured>p{font-size:18px}
.journal-list .guide-card:not(:last-child){border-bottom:1px solid var(--line);padding-bottom:24px}
.journal-list .guide-meta{margin-bottom:10px}
.journal-list .guide-card h3{font-size:22px;margin-bottom:0}
.journal-list .guide-card>p{display:none}
.finder-section{background:var(--paper);padding-block:65px;scroll-margin-top:20px}
.finder-layout{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:start}
.finder-copy{padding-top:10px}
.finder-copy h2{font-size:41px;line-height:1.14;margin-bottom:24px}
.finder-copy>p{font-size:18px;color:var(--body);max-width:41ch}
.finder-copy .small{font-size:14px;color:var(--muted);max-width:43ch;margin-top:32px}
.finder-form-wrap{min-width:0}
fieldset{border:0;padding:0;margin:0 0 23px}
legend{font-weight:650;font-size:18px;margin-bottom:16px}
.radio-choice{display:flex;align-items:center;gap:13px;border:1px solid #bac3b6;padding:14px 16px;margin-top:10px;cursor:pointer;border-radius:3px;background:#fff;font-size:16px;line-height:1.5}
.radio-choice:has(input:checked){border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}
input[type=radio]{width:18px;height:18px;margin:0;flex-shrink:0}
.select-label{display:block;font-size:15px;font-weight:650;margin-bottom:10px}
select,input[type=number]{width:100%;border:1px solid #a8b2a3;border-radius:3px;background:#fff;color:var(--ink);padding:12px;font-size:16px}
.finder-submit{margin-top:20px}
.finder-result{padding-top:23px;margin-top:25px;border-top:1px solid #bfc8ba;font-size:16px;color:var(--body)}
.finder-result h3{font-size:23px;margin-bottom:15px}
.finder-result p{margin-bottom:15px}
.finder-result a{color:var(--blue);font-weight:600}
.section{padding-block:75px}
.section.compact{padding-top:15px;padding-bottom:65px}
.product-grid{display:grid;grid-template-columns:1fr!important;gap:0;border-top:1px solid var(--line)}
.product-card{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,.8fr) minmax(175px,.7fr);gap:35px;padding-block:28px;border-bottom:1px solid var(--line);align-items:center}
.product-info h3{font-size:23px;line-height:1.3;margin-bottom:12px;max-width:28ch}
.product-info h3 a{text-decoration:none}
.product-info h3 a:hover{text-decoration:underline}
.product-info h3 span{font-weight:700}
.product-info .small{margin-bottom:8px;font-size:13px}
.product-info>p:last-child{font-size:15px;color:var(--body);margin-bottom:0;max-width:49ch}
.product-fact>p{font-family:Archivo,sans-serif;font-size:21px;font-weight:500;line-height:1.35;margin-bottom:10px;max-width:21ch}
.product-fact>span{font-size:12px;color:var(--muted)}
.product-actions{display:flex;flex-direction:column;gap:15px;align-items:stretch}
.product-actions .text-link{font-size:14px}
.merchant-button{color:var(--ink);background:#fff;border-color:#aeb6a9;padding:10px 14px;font-size:13px;white-space:nowrap}
.merchant-button:hover{background:var(--paper);border-color:var(--ink)}
.affiliate-note{font-size:13px;line-height:1.6;color:var(--muted);margin-top:25px;max-width:105ch}
.method-strip{display:grid;grid-template-columns:.7fr 1fr;gap:70px;padding-block:30px 70px}
.method-strip h2{font-size:34px;margin:0}
.method-strip p{max-width:64ch;font-size:17px;color:var(--body)}
.site-footer{background:var(--paper);padding:55px 0 26px}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:70px;padding-bottom:35px}
.footer-top .brand{font-size:36px}
.footer-top>div>p{font-size:15px;color:var(--body);margin-top:24px}
.footer-top h2{font-size:17px;margin:0 0 22px;letter-spacing:-.015em}
.footer-top>div>a:not(.brand){display:block;font-size:14px;text-decoration:none;color:var(--body);margin-bottom:10px}
.footer-top>div>a:hover{text-decoration:underline}
.footer-disclosure{font-size:12px;line-height:1.7;border-top:1px solid #ccd2c7;padding-top:22px;color:var(--muted);max-width:115ch;margin-bottom:30px}
.footer-bottom{display:flex;justify-content:space-between;gap:25px;font-size:12px;color:var(--muted)}
.breadcrumbs{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;padding-top:30px;font-size:13px;color:var(--muted)}
.breadcrumbs a{text-decoration:none}
.breadcrumbs a:hover{text-decoration:underline}
.page-heading{padding-block:55px 45px}
.page-intro{font-size:21px;color:var(--body);max-width:65ch;line-height:1.65;margin-bottom:0}
.category-hero{display:grid;grid-template-columns:1.5fr .7fr;gap:80px;padding-block:55px;align-items:center}
.category-hero h1{font-size:52px;max-width:820px}
.category-hero-note{border-left:1px solid var(--line);padding-left:35px}
.category-hero-note>p{font-family:Archivo,sans-serif;font-size:29px;line-height:1.2;letter-spacing:-.025em;margin-bottom:20px}
.category-hero-note>span{font-size:15px;color:var(--muted);display:block}
.criteria-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:50px;border-block:1px solid var(--line);padding-block:32px}
.criteria-grid h2{font-size:23px;margin-bottom:14px}
.criteria-grid p{font-size:16px;color:var(--body);margin-bottom:0;max-width:40ch}
.guides-section{background:var(--paper)}
.guides-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px;margin-top:30px}
.guides-grid .guide-card{padding-top:22px;border-top:1px solid #aeb8a6}
.two-columns{grid-template-columns:repeat(2,minmax(0,1fr))}
.all-guides{row-gap:45px}
.article-heading{padding-block:50px;max-width:1080px}
.article-heading h1{font-size:clamp(35px,4.6vw,62px);max-width:1050px}
.article-meta{display:flex;flex-wrap:wrap;gap:25px;font-size:14px;color:var(--muted)}
.article-meta a{text-decoration:none;font-weight:600}
.article-layout{display:grid;grid-template-columns:230px minmax(0,760px);gap:75px;justify-content:center;align-items:start}
.toc{position:sticky;top:25px;font-size:14px;padding-top:15px;border-top:2px solid var(--ink)}
.toc nav>p{font-weight:650;margin-bottom:20px}
.toc ol{list-style:none;padding:0;margin-bottom:25px}
.toc li{margin-bottom:15px}
.toc li a{color:var(--muted);text-decoration:none}
.toc li a:hover{text-decoration:underline}
.toc-category{display:block;padding-top:20px;border-top:1px solid var(--line);font-size:13px;font-weight:650;text-decoration:none;color:var(--blue)}
.toc-category .icon{display:none}
.article-body{min-width:0;font-size:19px;line-height:1.8;color:var(--body)}
.article-body h2,.prose-page h2{font-size:30px;line-height:1.2;color:var(--ink);margin-top:45px;margin-bottom:22px}
.article-body h3{font-size:23px;color:var(--ink)}
.article-body a,.prose-page a{color:var(--blue)}
.article-section{margin-top:40px}
.answer-box{padding:28px 32px;background:var(--paper)}
.answer-box h2,.answer-box h3{font-size:19px!important;letter-spacing:-.02em;margin:0 0 15px!important}
.answer-box p{font-size:18px;line-height:1.75;margin-bottom:0}
.sources{border-top:1px solid var(--line);margin-top:50px;padding-top:5px;font-size:15px;overflow-wrap:anywhere}
.sources h2{font-size:25px}
.sources ul{padding-left:20px}
.correction{margin-top:35px;font-size:15px;padding-block:25px;border-top:1px solid var(--line)}
.correction h2{font-size:22px;margin-top:0;margin-bottom:15px}
.correction p{margin-bottom:0}
.table-scroll{overflow-x:auto;max-width:100%;margin-block:28px}
.table-scroll:focus-visible{outline-offset:-3px}
table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.6;text-align:left;font-variant-numeric:tabular-nums}
th,td{padding:18px 16px;vertical-align:top;border-bottom:1px solid var(--line);min-width:145px}
thead{background:var(--paper)}
thead th{font-weight:650}
caption{text-align:left;color:var(--muted);font-size:14px;padding-bottom:15px}
.comparison-table{min-width:1000px}
.comparison-table td:nth-child(4){width:35%}
.comparison-products{margin-top:45px}
.filters{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:22px}
.filter{background:#fff;color:var(--ink);border:1px solid #aeb8a6;border-radius:3px;padding:10px 19px;font-size:15px;line-height:1.6}
.filter.active{background:var(--ink);border-color:var(--ink);color:#fff}
.prose-page{max-width:810px;font-size:19px;color:var(--body);padding-bottom:80px;overflow-wrap:anywhere;line-height:1.8}
.prose-page h2:first-child{margin-top:0}
.product-page-heading{display:grid;grid-template-columns:1.6fr .8fr;gap:80px;align-items:center;padding-block:50px 60px}
.product-page-heading h1{font-size:50px;line-height:1.1}
.product-page-heading .small{margin-top:25px}
.product-page-fact{background:var(--paper);padding:30px}
.product-page-fact>p{font-family:Archivo,sans-serif;font-size:31px;line-height:1.2;font-weight:550;letter-spacing:-.025em;margin-bottom:22px}
.product-page-fact>span{display:block;font-size:14px;color:var(--muted);line-height:1.65}
.product-detail-grid{display:grid;grid-template-columns:minmax(0,780px) 300px;gap:80px;align-items:start;margin-bottom:70px}
.product-detail-grid .article-body>h2:first-child{margin-top:0}
.spec-list{font-size:17px;line-height:1.65;font-variant-numeric:tabular-nums;margin-block:25px 35px}
.spec-list>div{display:grid;grid-template-columns:1fr 1fr;gap:25px;border-bottom:1px solid var(--line);padding-block:16px}
.spec-list dt{font-weight:650;color:var(--ink)}
.spec-list dd{margin:0;overflow-wrap:anywhere}
.caution-box{background:var(--paper);padding:27px 30px;margin-block:30px}
.caution-box h3{font-size:20px;margin-bottom:13px}
.caution-box p{font-size:17px;margin-bottom:0}
.buy-box{position:sticky;top:30px;background:var(--paper);padding:28px}
.buy-box h2{font-size:26px;margin-bottom:22px}
.buy-box>p{font-size:16px;color:var(--body)}
.buy-box>.small{font-size:13px;margin-block:22px}
.buy-box .merchant-button{width:100%}
.tool-box{background:var(--paper);padding:30px;margin-block:40px}
.tool-box h2{font-size:26px;margin-top:0}
.tool-box>p{font-size:16px}
.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-block:25px}
.form-grid label{font-size:14px;line-height:1.5;font-weight:650}
.form-grid input{margin-top:10px}
.cost-result{font-size:16px;background:#fff;padding:22px;margin-top:25px;line-height:1.8}
.cost-result p{margin:0}
.tool-box>.small{margin-top:22px;margin-bottom:0}
.small{font-size:14px}
.muted{color:var(--muted)}
.not-found{padding-block:110px}
.not-found .button{margin-top:25px}
@media(min-width:1500px){.hero-photo img{height:590px}.home-hero{gap:60px}}
@media(max-width:1100px){.container{width:calc(100% - 64px)}#navigation{gap:23px}#navigation a{font-size:14px}.hero-photo img{height:500px}.hero-copy h1{font-size:72px}.home-hero{gap:30px}.category-card h3{font-size:21px}.category-grid{gap:22px}.air-feature{padding:42px;gap:40px}.finder-layout{gap:50px}.article-layout{grid-template-columns:200px minmax(0,1fr);gap:40px}.product-card{gap:25px}.product-detail-grid{grid-template-columns:minmax(0,1fr) 270px;gap:40px}.journal-layout{gap:40px}.footer-top{gap:35px}}
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.cookie-controls p{flex-basis:100%;margin:0;max-width:90ch}
.cookie-controls p:empty{display:none}
.bottom-ad{padding:25px 0 45px;text-align:center;border-top:1px solid var(--line)}
.bottom-ad>span{display:block;color:var(--muted);font-size:12px;margin-bottom:15px}
.bottom-ad .adsbygoogle{display:block;min-height:250px;width:100%}